This early advert for the L-6S was printed when the guitar was at it's peak. 1974 was the only year with reasonable sales, despite the high profile endorsement of Carlos Santana, Al DiMeola and others over the following years.
This early instrument has the block inlaid fingerboard markers, which would soon be changed to dots.
...Power hungry? We haven't heard a more powerful pickup than the new design Super Humbuckings on the L6-S. The notes are extra loud, with enough sustain to live on when others die. And six different sound settings let you deliver any music style from country "chicken pickin'" to the most abstract jazz riffs.